# CVE-2026-87719 — GitLab

> As of 2026-09-12, CVE-2026-87719 is a CRITICAL-severity vulnerability in GitLab, CVSS v3.1 9.9, EPSS 0.6% (47.4th percentile). Threadlinqs Intelligence links 1 tracked threat campaign to CVE-2026-87719, most recently “GitLab Patches Max-Severity Unauthenticated Path Traversal Flaw in Repository Commits API (CVE-2026-85706, CVSS 10.0)”.

**Last updated:** 2026-09-12

## What is CVE-2026-87719?

GitLab has remediated an issue in GitLab EE affecting all versions from 18.3 before 19.1.8, 19.2 before 19.2.6, and 19.3 before 19.3.2 that under certain conditions could allow an authenticated user with Duo Chat access to obtain Advanced Search instance configurations and sensitive credentials using a specially crafted GraphQL subscription argument to bypass serialization and perform server object lookup.

The record classifies CVE-2026-87719 under weakness class [CWE-502](https://intel.threadlinqs.com/cwe/CWE-502). Its CVSS v3 base vector states that the flaw is reachable remotely over the network, needs low-privilege credentials, needs no user interaction, and has high impact on confidentiality, integrity, availability. 1 affected-product entry is recorded, across 1 vendor, listed below. The identifier was first published 23 days ago.

## Severity and exploitation probability

- **CVSS v3.1 base score:** 9.9 — CRITICAL (`CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H`)
- **EPSS (FIRST):** 0.6% probability of exploitation in the next 30 days, higher than 47.4% of all scored CVEs
- **CISA KEV:** Not listed in the CISA Known Exploited Vulnerabilities catalog
- **Threadlinqs priority:** 6.8/10 — a Threadlinqs composite of the CVSS base score, the EPSS percentile and public exploit availability
- **Published:** 2026-09-12

## Is CVE-2026-87719 being exploited?

No public exploitation evidence for CVE-2026-87719 is recorded in the sources Threadlinqs tracks — CISA KEV, Exploit-DB, public proof-of-concept repositories and ProjectDiscovery Nuclei — as of 2026-09-12. That is an absence of evidence in those feeds, not a guarantee that the vulnerability is unexploited.

## Affected products and versions

- [GitLab](https://intel.threadlinqs.com/vendors/gitlab): GitLab

## How to fix CVE-2026-87719

No vendor patch reference has been recorded for CVE-2026-87719 in the tracked sources. Follow the references below for a fix, and treat the products listed above as exposed until the vendor states otherwise.

## Threat activity tracking CVE-2026-87719

1 tracked threat in the Threadlinqs corpus references CVE-2026-87719, either in the campaign’s CVE list or as an indicator on the campaign record.

- [GitLab Patches Max-Severity Unauthenticated Path Traversal Flaw in Repository Commits API (CVE-2026-85706, CVSS 10.0)](https://intel.threadlinqs.com/threat/TL-2026-2442) — CRITICAL · 2026-09-11

## Sources

Enriched from CVE.org, FIRST EPSS, GitHub Security Advisories. Last verified by Threadlinqs on 2026-09-12.

**Exploit and proof of concept**

- [hackerone.com — technical description](https://hackerone.com/reports/4012289)

**Other references**

- [gitlab.com](https://gitlab.com/gitlab-org/gitlab/-/work_items/628160)

Canonical: https://intel.threadlinqs.com/cve/CVE-2026-87719
Full detection coverage and IOCs for threats exploiting CVE-2026-87719 via the Threadlinqs MCP server (Purple tier): https://intel.threadlinqs.com/mcp